An opal is the lowest level of semi-precious gem. It is obtained by cutting an uncut opal with a chisel at level 1 Crafting, though there is a chance (that decreases as Crafting level increases) the player will accidentally destroy it in the process, turning it into a crushed gem. Successfully cutting an uncut opal grants the player 15 Crafting experience; if it is crushed, the player will only receive 3.8 Crafting experience.